The following list is taken from the Wikipedia article "Outline of terrorism in the United States".
Here's the link:
https://en.wikipedia.org/wiki/Outline_of_terrorism_in_the_United_States
The following is a list of terrorist attacks that have happened throughout United States history, which were committed by United States citizens.
May 21, 1856: Sacking of Lawrence
May 24, 1856 – May 25, 1856: Pottawatomie massacre
September 11, 1857: Mountain Meadows massacre
April 14, 1865: Assassination of Abraham Lincoln
May 4, 1886: Haymarket affair
September 6, 1901: Assassination of William McKinley
October 1, 1910: Los Angeles Times bombing
July 22, 1916: Preparedness Day bombing
May-July, 1917: lynchings and burning of East St. Louis.
May-October, 1919: lynchings and burned homes in 36 cities during Red Summer of 1919
April–June 1919: 1919 United States anarchist bombings
September 16, 1920: Wall Street bombing
May 31 – June 1, 1921: burning of Black Wall Street
January, 1923: razing and massacre of Rosewood
May 18, 1927: Bath School Disaster
October 12, 1958: Bombing of the Hebrew Benevolent Congregation Temple
September 15, 1963: 16th Street Baptist Church Bombing
August 24, 1970: Sterling Hall bombing
November 7, 1983: 1983 U.S. Senate bombing
April 19, 1995: Oklahoma City bombing
July 27, 1996: Centennial Olympic Park bombing
October 13, 2000: Firebombing of Temple Beth El (Syracuse)
September 2001: anthrax attacks
May 2002: Mailbox Pipe Bombing – Luke Helder
October 2002: Beltway Sniper Attacks
March 3, 2006: Mohammed Reza Taheri-azar SUV attack
July 28, 2006: Seattle Jewish Federation shooting
July 27, 2008: Knoxville Unitarian Universalist church shooting
May 31, 2009: Assassination of George Tiller
June 1, 2009: 2009 Little Rock recruiting office shooting
June 10, 2009: United States Holocaust Memorial Museum shooting
November 5, 2009: Fort Hood shooting
February 18, 2010: 2010 Austin suicide attack
September 1, 2010: Discovery Communications headquarters hostage crisis
August 5, 2012: Wisconsin Sikh temple shooting
April 15, 2013: Boston Marathon bombing
June 17, 2015: Charleston church shooting
November 27, 2015: Colorado Springs Planned Parenthood shooting
December 2, 2015: San Bernardino attack
June 12, 2016: Orlando nightclub shooting
September 17–19, 2016: New York and New Jersey bombings